Issue |
Aquat. Living Resour.
Volume 2, Number 3, July-September 1989
|
|
---|---|---|
Page(s) | 185 - 187 | |
DOI | https://doi.org/10.1051/alr:1989022 | |
Published online | 15 July 1989 |
Ambisexuality in a South American cichlid: Satanoperca aff. leucosticta
Ambisexualité chez un cichlidé sud-américain : Satanoperca aff. leucosticta
INRA, Laboratoire de Physiologie des Poissons, Campus de Beaulieu, 35042 Rennes Cedex, France
Received:
2
September
1988
Accepted:
18
January
1989
Thirty eight Satanoperca aff. leucosticta were collected in French Guyana rivers and the histology of the gonads was studied. While the structure of the ovaries follows the general pattern known for other cichlids, previtellogenic oocytes are present in the outer layer of all the testes, whatever the spermatogenetic stage. These oocytes never grow nor mature. Histological observation of all of the gonads has not revealed whether this cichlid is hermaphroditic or gonochoristic.
Résumé
Trente-huit Satanoperca aff. leucosticta ont été pêchés dans des rivières de Guyane Française et l'histologie des gonades a été étudiée. Tandis que la structure des ovaires est semblable à celle connue chez les cichlidés, des ovocytes en prévitellogenése sont présents à la périphérie de tous les testicules quel que soit leur stade spermatogénétique.Ces ovocytes ne maturent jamais. L'observation histologique des gonades n'a pas permis de savoir si ce cichlidé est hermaphrodite ou gonochorique.
Key words: Fish / cichlid / South America / ambisexuality / intersexuality / hermaphroditism / testis / ovary
Mots clés : Poisson / cichlidé / Amérique du Sud / ambisexualité / intersexualité / hermaphrodisme / testicule / ovaire
© IFREMER-Gauthier-Villars, 1989
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